Effects of Obstructive Sleep Apnea on the Frequency of Vaso-occlusive Crises Events and Bio-physical Markers in Sickle Cell Disease

About the study

Despite the fact that obstructive sleep apnoea (OSA) is highly prevalent in the sickle cell population, studies focusing on the associations of the two diseases and their common pathophysiological mechanisms are scarce. OSA is one of the most common conditions responsible for hemoglobin desaturation. The nocturnal hemoglobin desaturation occurring in some sickle cell disease (SCD) patients with OSA could trigger hemoglobin S polymerization and red blood cell (RBC) sickling, leading to further blood rheological alterations, hence increasing the risks for VOC. Moreover, OSA has been demonstrated to increase oxidative stress and inflammation in non Sickle Cell Disease (SCD) patients, which, in SCD patients, could increase the risk for complications. Finally, OSA is accompanied by impaired vascular function and autonomic nervous system dysfunction in the general population. Indeed, the presence of OSA in SCD could increase the clinical severity of patients and the frequency of VOC.

Study point of contact

Emeric Stauffer, MD
+33 4 26 10 92 67
[email protected]


3 France sites


15 Years - 50 Years


Not Applicable

Study type





Diagnostic Test



participation requirements

Homozygous HbS (Hemoglobin S) (SS) patients,
aged between 15 and 3 months and 50 years old,
in steady state (i.e. without vaso-occlusive crisis or recent blood transfusion),
followed by the sickle cell center of the Hospices Civils de Lyon,
and showing symptoms of OSA.

participation restrictions

Patients receiving treatment of OSA,
recent blood transfusion (less than 2 months),
patients not at steady state (VOC or acute chest syndrome less than 2 months),


  • Lyon, France, Hôpital Edouard Herriot
  • Lyon, France, Centre Léon Berard
  • Lyon, France, Hôpital de la Croix Rousse
Last updated 2020-11-24